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8251 USART chip

80 bytes added, 13:51, 22 February 2010
* A KR580WW51A (russian clone of the 8251) is used by [[Aleste 520EX]], clock source comes from a [[8253 chip]].* An A 8251 is said to be used by [[Cirkit serial interface]], clock source and I/O ports are unknown.
== 8251 vs 8251A ==
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